Adjustable handle



FIG. 1 is a front perspective view of an adjustable handle, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevation view thereof, wherein a rear elevation view is a mirror image thereof; and,

FIG. 5 is a left side elevation view thereof, wherein a right side elevation view is a mirror image thereof.

The broken lines in the drawings illustrate portions of the adjustable handle which form no part of the claimed design. 

CLAIM The ornamental design for an adjustable handle, as shown and described. 